Math Calculators

Calculates the missing side of a right triangle using a² + b² = c².

Adds, subtracts, multiplies, and divides mixed numbers and improper fractions with step-by-step work.

Rounds any number to a specified decimal place or nearest value.

Performs addition, subtraction, multiplication, division, and power on decimal numbers.

Calculates the remainder and quotient for any division using the modulo operation.

Adds any list of numbers and shows the count, mean, minimum, and maximum.

Calculates n!, permutations (nPr), and combinations (nCr) for any non-negative integer.

Converts numbers to and from scientific notation and performs arithmetic in scientific notation.

Converts between hexadecimal, decimal, binary, and octal, and performs hex arithmetic.

Reduces any fraction to lowest terms using the greatest common divisor.

Converts decimals to fractions and fractions to decimals, including repeating decimals.

Calculates savings amount and final sale price for any discount percentage.

Calculates percent decrease, percent increase, and new value from any percent change.

Calculates percent error between experimental and theoretical values.

Solves proportions (a/b = c/d), checks if ratios are proportional, and scales ratios.

Solves any quadratic equation ax² + bx + c = 0, showing roots, discriminant, and vertex.

Solves linear and quadratic inequalities and shows the solution set in interval notation.

Evaluates polynomials at any x value and adds, subtracts, or multiplies two polynomials.

Solves 2×2 and 3×3 linear systems using Gaussian elimination, with step-by-step verification.

Finds f⁻¹(x) for linear, power, exponential, and logarithmic functions with domain and range.

Simplifies square roots and nth roots using prime factorization, showing exact form and decimal.

Finds an unknown value between two known points using linear interpolation or extrapolation.

Calculates the weighted mean from any list of values and weights.

Scales dimensions while maintaining aspect ratio, or simplifies any width-to-height ratio.

Calculates volume in cubic feet, cubic yards, cubic meters, liters, and gallons.

Calculates cylinder volume in cubic feet, liters, and gallons, plus surface area.

Finds the midpoint between two points in 2D or 3D space.

Calculates the distance between two points using the distance formula in 2D or 3D.

Calculates slope, y-intercept, distance, angle, and line equation from two points.

Calculates triangle area using base & height, Heron's formula, SAS, or coordinates.

Solves any triangle using the Law of Sines for AAS, ASA, and SSA cases.

Solves any triangle using the Law of Cosines for SAS and SSS cases.

Calculates the cross product vector and magnitude for two 3D vectors.

Calculates the determinant of 2×2 and 3×3 matrices with step-by-step cofactor expansion.

Finds the inverse of 2×2 and 3×3 matrices using the adjugate method.

Row reduces any 2×2, 2×3, 3×3, or 3×4 matrix to reduced row echelon form.

Calculates mean, median, mode, and range for any list of numbers.

Calculates population and sample standard deviation, variance, and mean for any dataset.

Calculates population and sample variance from any dataset, with standard deviation.

Calculates the mean absolute deviation (MAD) with step-by-step deviation table.

Calculates the standard error of the mean (SEM) from raw data or standard deviation.

Calculates the range (max − min) of any dataset, plus maximum, minimum, and mean.

Calculates Pearson r and r² from (x, y) data pairs with correlation interpretation.

Finds the regression line y = mx + b, Pearson r, R², and predictions from data.

Calculates P(X=k), P(X≤k), and P(X≥k) for any binomial distribution.

Calculates probabilities and z-scores under the normal distribution curve.

Calculates the confidence interval for a population mean at 90%, 95%, or 99% confidence.

Calculates survey margin of error or required sample size at any confidence level.

Performs one-sample and two-sample t-tests with t-statistic, df, and p-value.

Calculates the chi-square statistic and p-value for a goodness of fit test.

Calculates how long it takes an amount to double at any growth rate, with Rule of 70 and Rule of 72.